The roll approved and certified to the county officers by the board of county commissioners as in this chapter provided shall constitute the valuations of land, buildings and improvements furnished protection and services by the systems of the district against which valuation taxes shall be levied and collected annually in the same manner as general taxes for the continuing operations of the district and its systems. The valuations on said roll shall be subject to adjustment from time to time in the manner provided in RCW 85.15.060.
The board of county commissioners shall hold a hearing on such adjustments at the county seat at the time of equalization of real property assessments for the purpose of considering written objections to any revision of valuations filed at least ten days prior to the hearing and shall give published notice only of such hearing as provided in RCW 85.15.040.